Filter



Nov. 2, 1937; OH NORDELL 2,097,529

FILTER Filed Dec. 20, '1934 y ZSheets-Sheei 1 ZJZ/Van/e/Z .9, z m Wage;

Patented Nov. 2, 1937 I V Q v y Cal-1H. Nordell; Chicago, mii-ossl'iilortoliavsnoe Y 5 Engineering Company, Chicago, Ill., a-corporation of'lllinoia o. I I

hpplicationjneeemberifl, 19s4 ,'s f lsl2l-'l o. 753,31 .1;

This invention relates to filters, and particubeltascends upwardly towards thezopen face of J larly to filters adapted'to filter liquid from. solid the'chamber i ltispreferablyiflnallycleansed t matter which tends to choke the, filter medium to by watersprayedagainst it-from pipes I] and is a substantial extent. thereafter run'between rollers ll. 1 I

'15 The filter of .the present invention is adapted Aflerithas passed over the open facejof l stood from the foliowing description of a parmechanism; and

25 on a washing tank In which serves as the baseofa edih i openin {.The plates ,zlfiIare for the filtration of colloidal materials andsll dges. vacuum chamber II it moves downward y between generally, and is particularly applicable for use two friction rolls il gwhichaid in the circulatory in the filtration r s wage sludges. nt thejbe1t Aikniie or scraper is, is v i The present invention'lwillfreadily under l irfi qving ,s'olid ,materialkfro n the ticular' embodimentthereof, taken inconjunca "Yo- 1 tloh wlththe'a c mp yin -drawing in which W l z-ov ro e ao o the no.- Figure 1 is a sectional elevationthrough a 11 m erlitthe fabric i e p ed asses' downwardly into thewashing I filter embodying'my invention; 1 d t it ttu d the yry considerable pres Fig. 2 is a transverse elevational section theresure exer o 3 8? PPe I T W? lS l5 Fig 1;- p Qha'enoughJto withstand'the' pressurefand at Fig. 3 is a side elevation of the filter, on a W11? m me i? 12 9; is driven'to'nrove smaller scale showing, in particular, the drive in the meit fl fif theiabflfltm he me e. 1 bodimentof the invention ill'ustratedQthissup: Fla. 4 is a sectional detail view taken on the Por n o i d b amovinacoriveyor znwhloh of Fig. 3, sh'owing the manner in which m d l t t -em h the partitions may be adjusted. 1 a e t Width the pen n e face f 'v Referring to the drawings, the filteris built h b r i; h at ep siti nt eplatesa'l,

of. the section being taken on, the line 2- -2 of pressure J1 :p ovlaee moving support; which is 7 the'machine; Upon the upperface of the tank v e oo n ed in erieshy m m -ti ers i0 is supported an elongated vacuum chamber l m hq fl sii dv h II, the outlet 12 of whle s connected to suitable inner d p atese; ers-- nro vacuum creating apparatus(not shown) for the l d fiachelld wi ro le s" dfl d 3o purpose of drawing-liquid through t mt ge berfil l isprovidedwith.longitudinal rallsjfl on dium and from the chamber II, The upper face ch83? i l eh w i p izceoi' the chamber of the chamber-H is open and a lateral longi-y. pon which the rollersjll 3111115 'w ll tudinal flange I3 is provided alongthis opening seen t a the Pressu t e ai a ing; on t e] for the pllIDOSe'of receiving the fllter'fabric H transmitted-to the P 8 88- lind yih t which is somewhatwider than the opening in the nsmitted to the rolls "Th 1 MB". 2.! fire 1.

top of the chamber u., I i ovi w t upernelaliar ovesI onif: w h n v The filter fabric l4 lslhthe formyof. aeohf ions. x d,. otheii j o e 1 tinuous belt which extends over the open face of P at -f .Itw lieund rs i he l ui J the vacuum chamber II and extends around the o a mtefmbrid '4 D S th C the!!! 40 vacuum chamber in the manner shown in Fig. 1; s oo se o i etio ei o the m '0 The length of the fabric'belt I4 is sufllcientjthat he he d of the abflo'i lt e t h H ep'mthe lower length thereof is immersed in' the tank de h v on o v lhflw i h; 111139951911,

Ill and is m a state or freedom therein, which decrease i i aht't w jthe r t he fil e 1 enables'thorough cleansing tobe eifected. gc e m h be g d t th feet, ha e; 4 I provide in the tank ll a pluralitvof-beaters 'Weter s o ahit b t belt mov s ls whleh are rotated so as to beat the fabric 14 heop if o th e e r -TM h while it passes through the tank; I prefer to pro on nd f e fi e th wells 15 are conne d vide beaters In which actonbothsldes of the y a tran v wa T 'wa "terminates fabric, and as will 'be understood from Fig. 1.1 1 8 tly' ab0ve the top surfaceof the-chamber ii I 5o prefer to drive some of the heaters in one direc-' so as ,topelfmitthefllter fabric 14' t0 M58 under tion and some in the'other direction. Aslwill ap-* hiswall. 'As fl llh me II-Q 1 pear from Fig. 1, the tank lil contains enough suitable ile dble material maybe provided to bear washing fluid effectively to'treat the belt passing against'tlie top 'ofpthe fabric and provide a water-- therethrough. The washing fluid normally used tight seal atthis location. A plurality of partiis water. After being washed in the tank the tions 28 extend between the walls 2! so as to 55 divide the space above the open face of thechamber H into a series of chambers 29. 30, 3|, and 32.

The lower end of the partitions" are located some distance above the filter fabric l4 so that liquid may pass through chambers 23, 30. 3|, and 32 in series. The spacing of the partitions 28 from the filter fabric should be such that a sub stantial amount of liquid is retained. in each compartment The partitions. .28 are .preferably regulable in height. which may suitably be provided in the manner-shown in Fig. .4.

According to the construction shown in this figure, each partition 28 is provided at each side with a flange 33. The flange 33 carries a series of openings 34. On its exterior,.the wallhas mounted a spring 35 whichicarrie's a' pin36 which extends throughan opening in the wall 25. This opening is located in verticallalignment with respect to the openings 34. ltwillireadily beunderstood that the height of the partition. 2& can beadjusted by retracting the spring 35 to"bring 'the catede The partition is then moved in' -the desired direction and the most'lapprdpriate'opening 34 is brought into aligninentwith"'the 'pin 36.

*The sp'ring 35 is then released' to allow 35 to enter that openinga l The material to be filtered is supplied "to "the first compartment 25 by nieans'of asupply; pipe 31. The compartment-29 is provided with a plurality of scrapers '38 which new against the top surface of the filter fabric l4.

These scrapers are preferably directed somewhat obligue against th direction of movement" ofthe-filter fabric 14 an they may suitably be supported byeguides 33 mounted onth'ewalls25' and they'may bear against the'filter fabric" 14 by their owntweight.

'I may providesimilar scrapers. in the compartme'nt '30. In the compartmentsffl and 32 I may provide agitating means suchfa's rot'ating heaters 40, which carry scraping blades 4|. f' l lie func tion of the scrapers'38 is' to elevate deposit frorh the filter fabric I4 and presenta clear surface for the passage of liquid through the filter fabric. The 'beaters 40" have the same effect since the scraping bladesjl positively. rernov"""depo'sit from the filter fabrigil'n addition; the. heaters 40 keep the deposit-fin suspension owingto. the rotary movement yvhichthey impart to the liquid in the compartments and. Itjma'y I here be convenient to remark'th'at the p' per height of .theQpartitiOns 2a is; such e -e substantial amount r fluid is maintainedineachcornpart} Inent 29, 30,,3l', and 32without'overefiowin However, it ls' preferred to; have the .top 'of the partitions 28 somewhat belowflthe-top edge of v the 'wall 25 at the pariiciii r ie'edt n o thatany over-'fi'owiwhich Imay occur may take placelfrom one compartment to the nextwithout spilling o'ver the sidewalls 25.} g It will :readilybeunderstood that a very substa-ntial ,amount er mei duidfie withdrawn from the material .being filteredibelow.the co npart ments 29, .30, 31, 32. .The material passing from the compartment 32 is normally. in the state of a thick mud. This material is passed under pressure rollers 4|, 42 and 43 in series, which have the effect (if-pressing a-certain amountjof liquid.

from the depositthrough .tfiefilter-fabric l4.

. Between the pressure rollersg4 land 42. and 42 and 43, I provide scrapers44and-45. respectively; g which have the eilfect of stirring upthe deposit and presenting thesame to: the, filter fabric in an advantageous manner for the squeezing there: from of further liquid. The deposit passing beneath the pressure roller 43 is removed from the filter fabric by the knife H as hereinbefore mentioned. I Y

Referring now particularly to Fig. 3, it is to be noted that: the heaters l5 may be driven from a shaft 46 actuated by means of a belt 41. The heaters l5 are operated from this shaft by means of bevel gearing-.1 The heaters 40 and the pressure rolls 4!, 42 and 43 may be driven through bevel gearing from a shaft 43, which in turn is driven by a belt 49. The conveyer 20 passes over sprocket wheels 50, which are supported on shafts Ill-.Journaled in theside walls of the chamber ll.

. Qne- .ofI these shafts 5| is provided outside the chamber H. with a bevel gearv52 whereby it may be driven from theshaft 43. This sh'a'ft 5| also carries [sprocket wheel 53 outside the chamber which sprocket wheelmay be employed to drive one of the rolls 18. The other roll I8 may 'be journaled in blocks mou ted-i guides S S.

flfhepressme between the rollers I '8'. may be. controlledbymeansof a hand wheelii-I. Oncof the rolls I1 is likewise 'mounted'in ,blocks..5l which are slidablymqunted in guides 53. ,Thepress'ure 'betweenl the Q'rin'g'erj rolljJl. may. be' controlled in the same"man ner by'mean's of hand wheels: 53 It will thusbe "understood that I have provided a filter in which theldepo'sit is agitated and .ele-

vatedfrom the'filtering jmedlu n andin which thei'ideposit is furtherjco'mpresisd'against .the

filter medium ,for' tnepurpese'dr forcing liquid claim. 'as new 'and desire .to. secure by Letters Patent r the UnitedfStates. is: g r r 1. A filterha'ving a filtering position and com prising a continuous web .of'fabric. a movable conireyor for 'movingf'said fabric pastfsaid filtering p sit o means for supply ng liquid tobe filtered in said position .to the fabric; and, .means in said position for agitating said l'liquid andthe cake deposited therefromfiponthe filter. fabric 2."A filter comprising 'a'filter'fabriqmeans for moving the" fabric. T means abdve the fabric defining a plurality of chambers, means for supplying liquid filtered-.to said-chambers in se-e ries, andjmeans -wlth imthe chambers for. remov ing deposit 'frdmfthe' fabric and..worklng .the

deposit as thefabric passes below-said chambers.

. 3. A filter comprising 'gavacuum chamber hav-;

ing open face, aconveyor in said open face,-. a filter fabric supported on said conveyor, said fabric being in the form of a continuous web, a through which said wep passes. freely.

means in said tank foribeatin g andwashing the,- fabric in .a free condition as it -:passes therethroughemeans for retaining liquidqto be filtered;

above .the fabric on. the. conveyor, and means abovesaid fabric for breaking. up during filtering, any cake deposited thereon i V 

